need help w/ medieval terms "slot" "fork(e)"280

I'm trying to help a Portuguese translator who's translating a medieval English manuscript into Portuguese for her PhD.

She has encountered two terms related to butchery that she hasn't been able to find a Portuguese equivalent for. She has found descriptions of the parts of the body that the terms refer to and has asked Portuguese butchers if they can tell her the equivalent term, but they haven't been able to help her.

I thought that if I could find modern English equivalents, she might be able to find the equivalent Portuguese terms. These are the two words, with their definitions:

slot: "hollow above breast-bone at the base of the throat"; from Old French esclot, the depression of the breastbone

fork(e): "The lower part of the body where the legs diverge from the trunk usually including the legs"
(confusingly, I also found this definition: of brest (throt); the collar bone.)

If anyone here is able to provide the modern equivalents of these two terms, we will both be very grateful!